GB0526389D0 - Random refractive index modulated optical fibers - Google Patents
Random refractive index modulated optical fibersInfo
- Publication number
- GB0526389D0 GB0526389D0 GBGB0526389.2A GB0526389A GB0526389D0 GB 0526389 D0 GB0526389 D0 GB 0526389D0 GB 0526389 A GB0526389 A GB 0526389A GB 0526389 D0 GB0526389 D0 GB 0526389D0
- Authority
- GB
- United Kingdom
- Prior art keywords
- refractive index
- optical fibers
- modulated optical
- index modulated
- random refractive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000013307 optical fiber Substances 0.000 title 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/0208—Refractive index modulation gratings, e.g. Bragg gratings characterised by their structure, wavelength response
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/3537—Optical fibre sensor using a particular arrangement of the optical fibre itself
- G01D5/3538—Optical fibre sensor using a particular arrangement of the optical fibre itself using a particular type of fiber, e.g. fibre with several cores, PANDA fiber, fiber with an elliptic core or the like
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/020,955 US7369730B2 (en) | 2004-12-23 | 2004-12-23 | Random refractive index modulated optical fibers |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0526389D0 true GB0526389D0 (en) | 2006-02-08 |
GB2421586A GB2421586A (en) | 2006-06-28 |
GB2421586B GB2421586B (en) | 2008-09-17 |
Family
ID=35841192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0526389A Active GB2421586B (en) | 2004-12-23 | 2005-12-23 | Random refractive index modulated optical fibers |
Country Status (3)
Country | Link |
---|---|
US (1) | US7369730B2 (en) |
CA (1) | CA2531274C (en) |
GB (1) | GB2421586B (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7473906B2 (en) * | 2005-04-28 | 2009-01-06 | Claudio Oliveira Egalon | Reversible, low cost, distributed optical fiber sensor with high spatial resolution |
US7576856B2 (en) * | 2006-01-11 | 2009-08-18 | Baker Hughes Incorporated | Method and apparatus for estimating a property of a fluid downhole |
US7595876B2 (en) * | 2006-01-11 | 2009-09-29 | Baker Hughes Incorporated | Method and apparatus for estimating a property of a fluid downhole |
JP2008159718A (en) * | 2006-12-21 | 2008-07-10 | Sharp Corp | Multichip module and its manufacturing method, and mounting structure of multichip module and its manufacturing method |
US7493009B2 (en) * | 2007-05-25 | 2009-02-17 | Baker Hughes Incorporated | Optical fiber with tin doped core-cladding interface |
US7947945B2 (en) * | 2008-02-29 | 2011-05-24 | Corning Incorporated | Fiber optic sensing system, method of using such and sensor fiber |
US8463083B2 (en) * | 2009-01-30 | 2013-06-11 | Claudio Oliveira Egalon | Side illuminated multi point multi parameter optical fiber sensor |
US8087477B2 (en) * | 2009-05-05 | 2012-01-03 | Baker Hughes Incorporated | Methods and apparatuses for measuring drill bit conditions |
US9002152B2 (en) | 2010-05-04 | 2015-04-07 | Sensortran, Inc. | Mitigation of radiation induced attenuation |
US8638444B2 (en) | 2011-01-11 | 2014-01-28 | Baker Hughes Incorporated | Sensor array configuration for swept-wavelength interferometric-based sensing systems |
US8592747B2 (en) | 2011-01-19 | 2013-11-26 | Baker Hughes Incorporated | Programmable filters for improving data fidelity in swept-wavelength interferometry-based systems |
GB2500255B (en) | 2012-03-16 | 2020-04-15 | Oxsensis Ltd | Optical sensor |
US9321222B2 (en) | 2013-08-13 | 2016-04-26 | Baker Hughes Incorporated | Optical fiber sensing with enhanced backscattering |
EP3842738B1 (en) * | 2016-06-29 | 2022-10-19 | Intuitive Surgical Operations, Inc. | Methods and apparatus for ofdr interrogator monitoring and optimization |
CN110823834B (en) * | 2019-11-16 | 2022-10-11 | 中北大学 | High-sensitivity SPR refractive index sensor based on plastic optical fiber periodic narrow groove structure |
US20230141615A1 (en) * | 2021-11-11 | 2023-05-11 | Baker Hughes Oilfield Operations Llc | Grating position dithering for improved distributed acoustic sensing engineered fiber performance |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4840481A (en) | 1987-12-10 | 1989-06-20 | Simmonds Precision | Polarimetric optical frequency domain distributed strain sensor and method |
US4983034A (en) | 1987-12-10 | 1991-01-08 | Simmonds Precision Products, Inc. | Composite integrity monitoring |
US5178978A (en) | 1990-09-06 | 1993-01-12 | The United States Of America As Represented By The Secretary Of The Air Force | Fabricating integrated optics |
US5208136A (en) | 1990-09-06 | 1993-05-04 | The United States Of America As Represented By The Secretary Of The Air Force | Fabricating of integrated optics |
JPH08125607A (en) * | 1994-10-21 | 1996-05-17 | Fujitsu Ltd | Optical transmission line fault point location method and optical transmission line |
DK0795117T3 (en) * | 1994-11-29 | 1999-09-13 | United Technologies Corp | Detection of removal of protective coating by optical fibers with Braggitter |
EP0757663B1 (en) * | 1995-02-01 | 1998-05-13 | Plasma Optical Fibre B.V. | Optical fiber having reduced polarisation mode dispersion |
US5798521A (en) | 1996-02-27 | 1998-08-25 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Apparatus and method for measuring strain in bragg gratings |
NL1008642C2 (en) * | 1998-03-19 | 1999-09-23 | Oce Tech Bv | Digital copier with a personal data storage system. |
US6384915B1 (en) * | 1998-03-30 | 2002-05-07 | The Regents Of The University Of California | Catheter guided by optical coherence domain reflectometry |
US6205265B1 (en) | 1998-05-29 | 2001-03-20 | Litton Systems, Inc. | Apparatus and method for isolated photobleaching fiber optic rotation sensor coils |
US6993222B2 (en) | 1999-03-05 | 2006-01-31 | Rj Mears, Llc | Optical filter device with aperiodically arranged grating elements |
US6545760B1 (en) * | 1999-03-25 | 2003-04-08 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Apparatus and method for measuring strain in optical fibers using rayleigh scatter |
US6724528B2 (en) | 2001-02-27 | 2004-04-20 | The United States Of America As Represented By The Secretary Of The Navy | Polarization-maintaining optical fiber amplifier employing externally applied stress-induced birefringence |
US6643429B2 (en) * | 2001-06-07 | 2003-11-04 | Nortel Networks Limited | Dispersion compensation apparatus and method utilising sampled Bragg gratings |
US6995900B2 (en) | 2003-01-21 | 2006-02-07 | Jds Uniphase Corporation | Method of making a short-pass fiber with controlled cut-off wavelength |
US6724469B2 (en) * | 2002-03-15 | 2004-04-20 | Exfo Electro-Optical Engineering Inc. | Polarization-OTDR for measuring characteristics of optical fibers |
CA2486297A1 (en) | 2002-05-17 | 2003-11-27 | The Board Of Trustees Of The Leland Stanford Junior University | Double-clad fiber lasers and amplifiers having long-period fiber gratings |
DE602004001038T2 (en) | 2004-01-08 | 2006-10-26 | Alcatel | Cascaded Raman laser with unpaired reflector |
-
2004
- 2004-12-23 US US11/020,955 patent/US7369730B2/en active Active
-
2005
- 2005-12-21 CA CA002531274A patent/CA2531274C/en active Active
- 2005-12-23 GB GB0526389A patent/GB2421586B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CA2531274C (en) | 2009-06-02 |
CA2531274A1 (en) | 2006-06-23 |
GB2421586B (en) | 2008-09-17 |
GB2421586A (en) | 2006-06-28 |
US20060140529A1 (en) | 2006-06-29 |
US7369730B2 (en) | 2008-05-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |